Number System
Find the least number exactly divisible by 12, 15, 20 and 27.
- ক. 540
- খ. 430
- গ. 320
- ঘ. 300
উত্তরঃ 540
The least number by which 294 must be multiplied to make it a perfect square, is:
- ক. 2
- খ. 3
- গ. 6
- ঘ. 24
উত্তরঃ 6
- ক. 25
- খ. 27
- গ. 30
- ঘ. 35
উত্তরঃ 35
The sum of two numbers is 25 and their difference is 13. Find their product.
- ক. 104
- খ. 114
- গ. 315
- ঘ. 325
উত্তরঃ 114
A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is the number?
- ক. 3.5
- খ. 6
- গ. 8
- ঘ. None of these
উত্তরঃ 8
What number should be devided by √0.25 to give the result as 25?
- ক. 12.5
- খ. 2.5
- গ. 50
- ঘ. 125
উত্তরঃ 12.5
- ক. 12, 5
- খ. 13, 4
- গ. 14, 3
- ঘ. 24, 10
উত্তরঃ 12, 5
If one-third of one-fourth of a number is 15, then three-tenth of that number is:
- ক. 35
- খ. 36
- গ. 45
- ঘ. 54
উত্তরঃ 54
The average of 7 consecutive number is 20. The largest of these number is:
- ক. 20
- খ. 22
- গ. 23
- ঘ. 24
উত্তরঃ 23
The least number of 4 digits which is a perfect square, is:
- ক. 1000
- খ. 1016
- গ. 1024
- ঘ. 1036
উত্তরঃ 1024
If product of two sequential positive odd numbers is 255, what are those numbers?
- ক. 11, 13
- খ. 13, 15
- গ. 13, 17
- ঘ. 15, 17
উত্তরঃ 15, 17
Which set of numbers is like the given set [48, 24, 12]?
- ক. [46, 22, 11]
- খ. [44, 22, 10]
- গ. [42, 20, 10]
- ঘ. [40, 20, 10]
উত্তরঃ [40, 20, 10]
Find the probability of selecting a prime number from a set numbers 1 to 15 (both inclusive).
- ক. 1/15
- খ. 3/5
- গ. 2/5
- ঘ. 7/15
উত্তরঃ 2/5
- ক. 5(2a + 9) + 2a = 74
- খ. 5(2a - 9) + 2a = 74
- গ. (4a + 9) + 5a = 74
- ঘ. 2(2a + 9) + 5a = 74
উত্তরঃ 2(2a + 9) + 5a = 74
- ক. 57
- খ. 72
- গ. 42
- ঘ. 50
উত্তরঃ 72
- ক. 32
- খ. 34
- গ. 36
- ঘ. 28
সঠিক উত্তরের জয় বিস্তারিত দেখুন
What is the next number in the series 1, 11, 27, 57, ...
- ক. 93
- খ. 63
- গ. 123
- ঘ. 113
সঠিক উত্তরের জয় বিস্তারিত দেখুন
The average of 15 consecutive integers is 15. What is the smallest of the 15 integers?
- ক. 8
- খ. 9
- গ. 15
- ঘ. 6
উত্তরঃ 8
Sum of 3 consucutive integers is 18. What is the smallest integer less 3?
- ক. 4
- খ. 5
- গ. 2
- ঘ. 3
উত্তরঃ 2
- ক. 190
- খ. 182
- গ. 176
- ঘ. 154
উত্তরঃ 190
What is the next number in the series? 8, 11, 17, 24, 29, 53, 78, ....
- ক. 102
- খ. 101
- গ. 75
- ঘ. 83
উত্তরঃ 101
- ক. 36
- খ. 33
- গ. 32
- ঘ. 30
উত্তরঃ 36
- ক. 60
- খ. 15
- গ. 75
- ঘ. 90
উত্তরঃ 60
If 1.4 is halfway between two points x and y what sre the possible values of x and y?
- ক. -1.4 and 2.4
- খ. -1 and 2
- গ. 0.3 and 3.1
- ঘ. 0.15 and 1.55
উত্তরঃ 0.3 and 3.1
If 2 < x < 4 and 3 < y < 7, what is the largest integer value of x + y?
- ক. 9
- খ. 10
- গ. 7
- ঘ. 8
উত্তরঃ 10
- ক. I only
- খ. II and III only
- গ. I and III only
- ঘ. I, II and III
উত্তরঃ II and III only
- ক. m2 + n2
- খ. mn + n2
- গ. m3 + n2
- ঘ. mn + m2
উত্তরঃ mn + m2
The average of four consecutive odd positive integers is always--
- ক. an even number
- খ. an odd number
- গ. divisible by 4
- ঘ. Both a and c
উত্তরঃ an even number
- ক. 1 or -1
- খ. -2
- গ. 1
- ঘ. -1
উত্তরঃ 1 or -1
What is the product of the odd integers between - 8 and 8?
- ক. 11025
- খ. 5005
- গ. 0
- ঘ. 10050
উত্তরঃ 11025
If n is an even integer which of the following must be an odd integer?
- ক. 7n - 2
- খ. 5(n - 2)
- গ. (16n + 24)/8
- ঘ. (6n + 12)/3
উত্তরঃ (16n + 24)/8
If x and y are prime numbers, which of the following cannot be the sum of x and y?
- ক. 5
- খ. 9
- গ. 13
- ঘ. 23
উত্তরঃ 23
How many of the positive integers less than 25 are 2 less than an integer multiple of 4?
- ক. two
- খ. three
- গ. four
- ঘ. six
উত্তরঃ six
- ক. 3/11
- খ. 3/10
- গ. 2/11
- ঘ. 1/5
উত্তরঃ 3/11
If - 1 < x ≤ 1 and x is an integer, then value of x is--
- ক. 0 only
- খ. 1 only
- গ. 0 and 1
- ঘ. one value more than 1
উত্তরঃ 0 and 1
Which of the following franctions has the smallest value?
- ক. 34.7/163
- খ. 125/501
- গ. 173/700
- ঘ. 10.9/42.7
উত্তরঃ 34.7/163
If 18 is 15 percent of 30 percent of a certain number, what is the number?
- ক. 9
- খ. 36
- গ. 40
- ঘ. 81
সঠিক উত্তরের জয় বিস্তারিত দেখুন
If k is an integer and .0010101×10k is greater than 1000, what is the least possible value of k?
- ক. 2
- খ. 3
- গ. 4
- ঘ. 5
সঠিক উত্তরের জয় বিস্তারিত দেখুন
- ক. 82
- খ. 37
- গ. 55
- ঘ. 73
সঠিক উত্তরের জয় বিস্তারিত দেখুন
How many pupils can be seated in a room with N single chairs and B double seated benches?
- ক. nb
- খ. 2nb
- গ. 2(b + n)
- ঘ. 2b + n
উত্তরঃ 2b + n
What are all values of x that satisfy the equation x2 + 4x + 3 = 0?
- ক. - 3
- খ. - 1
- গ. - 3 and - 1
- ঘ. 3 and 4
উত্তরঃ - 3 and - 1
The value of - 3 - (- 10) is how much greater than the value of - 10 - (- 3)?
- ক. 0
- খ. 6
- গ. 7
- ঘ. 14
উত্তরঃ 14
The average of 3 numbers is 7. If 2 of the numbers are zero, then what is the 3rd number?
- ক. 15
- খ. 17
- গ. 19
- ঘ. 21
উত্তরঃ 21
What is the difference between the 6 digit largest and the smallest numbers?
- ক. 888889
- খ. 899999
- গ. 999888
- ঘ. 988888
উত্তরঃ 899999
If N and P are odd numbers then which of the following must be even number?
- ক. NP
- খ. 2N + P
- গ. N + P
- ঘ. NP + 2
উত্তরঃ N + P
- ক. (s + 12)/4
- খ. (s - 12)/4
- গ. (s + 6)/4
- ঘ. (s - 6)/4
উত্তরঃ (s + 12)/4
If n and p are both even number, which of the following number must be an odd number?
- ক. n +2p
- খ. np + 1
- গ. n + p
- ঘ. 2n + p
উত্তরঃ np + 1
- ক. i only
- খ. ii only
- গ. iii only
- ঘ. i and ii
সঠিক উত্তরের জয় বিস্তারিত দেখুন
If x = 12, which of the following has the maximum value?
- ক. x - 3
- খ. (x - 7)(x - 9)
- গ. (x - 5)(x - 3)
- ঘ. (x - 8)(x - 7)
উত্তরঃ (x - 5)(x - 3)
- ক. 73
- খ. 63
- গ. 53
- ঘ. 50
উত্তরঃ 63
- ক. 5
- খ. 2
- গ. 3
- ঘ. 1
উত্তরঃ 1
What is the least integer that is a sum of three different primes each greater than 20?
- ক. 69
- খ. 73
- গ. 75
- ঘ. 83
উত্তরঃ 83
If n and p are both odd numbers, which of the following must be an even number?
- ক. np + 2
- খ. n + p
- গ. n + p + 1
- ঘ. np
উত্তরঃ n + p
If n is a positive integer and k + 2 = 3n, which of the following could be a value of k?
- ক. 1
- খ. 4
- গ. 7
- ঘ. 25
সঠিক উত্তরের জয় বিস্তারিত দেখুন
If both x and y are integers and x = 24y + 12, then which of the following must be true?
- ক. x/12 is even
- খ. x/6 is even
- গ. (x + 4)/8 is odd
- ঘ. (x + 4)/8 is even
উত্তরঃ x/6 is even
If m and n are positive integers, which of the following must be an even integer?
- ক. n(m - 1)
- খ. (n - 1)m
- গ. (m - 1)(n - 2)
- ঘ. n(n - 1)(m - 1)
উত্তরঃ n(n - 1)(m - 1)
If the product of 3 consecutive integers is 120, then the sum of the integers is----
- ক. 9
- খ. 15
- গ. 12
- ঘ. 14
উত্তরঃ 15
- ক. I only
- খ. II and III only
- গ. I and III only
- ঘ. III only
উত্তরঃ I and III only
Which of the following is the greatest?
- ক. 40% of 30
- খ. 3/5 of 25
- গ. 6.5% of 200
- ঘ. (1/2)-4
উত্তরঃ (1/2)-4
- ক. I only
- খ. II and III only
- গ. I and III only
- ঘ. III only
উত্তরঃ I only
If the sum of 3 consecutive integers is 150, then the sum of the two smaller integers is:
- ক. 99
- খ. 139
- গ. 110
- ঘ. none of these
উত্তরঃ 99
If n is an even integer which of the following must be an odd integer?
- ক. 3(n + 1)
- খ. n - 2
- গ. 3n + 5
- ঘ. n3
সঠিক উত্তরের জয় বিস্তারিত দেখুন
- ক. A + 1
- খ. A + 5
- গ. A + 25
- ঘ. 2A
উত্তরঃ A + 25
If x is negative, which of the following must also be negative?
- ক. (-x3)2
- খ. (-1)x
- গ. 1 - x
- ঘ. x3 - x2
উত্তরঃ x3 - x2
If an integer y is subtracted from an integer x, and the result is greater than x, then y must be :
- ক. Equal to x
- খ. Less than 0
- গ. Less than x
- ঘ. Greater than 0
উত্তরঃ Less than 0
If the product of three consecutive integers is 210, then the sum of the two smaller integers is----
- ক. 5
- খ. 11
- গ. 20
- ঘ. 13
উত্তরঃ 11
The positive difference between the squares of any two consecutive integers is always---
- ক. an even integer
- খ. an odd number
- গ. a prime number
- ঘ. the square of an integer
উত্তরঃ an odd number
If n is a positive integer then what is the remainder when {3(8n + 3) + 2} is devided by 5?
- ক. 4
- খ. 1
- গ. 0.4
- ঘ. 0
সঠিক উত্তরের জয় বিস্তারিত দেখুন
If x is an integer, then which of the following is must be odd?
- ক. 2x + 2
- খ. 13x
- গ. x
- ঘ. 2x + 3
উত্তরঃ 2x + 3
- ক. 96
- খ. 25
- গ. 48
- ঘ. 75
সঠিক উত্তরের জয় বিস্তারিত দেখুন
- ক. 24
- খ. 36
- গ. 48
- ঘ. 96
উত্তরঃ 96
Find the missing number in the series 3, 6, 18, 72, 360, --
- ক. 720
- খ. 1440
- গ. 2160
- ঘ. None of the above
উত্তরঃ 2160
If x is an integer, then which of the following is always an even integer?
- ক. x - 1
- খ. x + 1
- গ. x + 2
- ঘ. 2x + 2
উত্তরঃ 2x + 2
If the sum of the 3 consecutive integers is 240, then the sum of the two larger integers is:
- ক. 79
- খ. 159
- গ. 169
- ঘ. 161
উত্তরঃ 161
Which of the following fractions has the smallest value?
- ক. 8/7
- খ. 10/9
- গ. 21/20
- ঘ. 41/40
সঠিক উত্তরের জয় বিস্তারিত দেখুন
x = 2y + 3 and y = - 2; Quantity A = x and Quantity B = - 1
- ক. Quantity in A is greater
- খ. Quantity in B is greater
- গ. The two quantities are equal
- ঘ. The relationship cannot be determine from the information given
উত্তরঃ The two quantities are equal
r>s>0; Quantity A = rs/r and Quantity B = rs/s
- ক. Quantity in A is greater
- খ. Quantity in B is greater
- গ. The two quantities are equal
- ঘ. The relationship indetermine
উত্তরঃ Quantity in B is greater
In a class composed of x girls and y boys what part of the class is composed of girls?
- ক. y / (x + y)
- খ. x / xy
- গ. x / (x + y)
- ঘ. y / xy
উত্তরঃ x / (x + y)
A farmer had 20 hens. All but 2 died. How many hens are still alive?
- ক. 2
- খ. 10
- গ. 15
- ঘ. 18
উত্তরঃ 2
Find the value of (0.1 × 0.01 × 0.001) ÷ (0.2 × 0.02 × 0.002)
- ক. 14
- খ. 18
- গ. 21
- ঘ. 28
সঠিক উত্তরের জয় বিস্তারিত দেখুন