Number System

101. 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

102. The sum of two positive integers multiplied by the bigger number is 204, and their difference multiplied by the smaller number is 35. The numbers are:

• ক. 12, 5
• খ. 13, 4
• গ. 14, 3
• ঘ. 24, 10

103. The number of girls in a class is 5 times the number of boys. Which of the following can not be the total number of children in the class?

• ক. 24
• খ. 30
• গ. 35
• ঘ. 126

104. What number should be devided by √0.25 to give the result as 25?

• ক. 12.5
• খ. 2.5
• গ. 50
• ঘ. 125

105. 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

106. The sum of two numbers is 25 and their difference is 13. Find their product.

• ক. 104
• খ. 114
• গ. 315
• ঘ. 325

107. The average of five numbers is 27. If one number is excluded, the average becomes 24. The excluded numbers is:

• ক. 25
• খ. 27
• গ. 30
• ঘ. 35

108. The least number by which 294 must be multiplied to make it a perfect square, is:

• ক. 2
• খ. 3
• গ. 6
• ঘ. 24

109. Find the least number exactly divisible by 12, 15, 20 and 27.

• ক. 540
• খ. 430
• গ. 320
• ঘ. 300