NMBERS I

Which of the following numbers are Prime?

• 323

• 437

• 667

• 641

The least number which when divided by 4, 6, 8, 12 and 16 leaves a remainder of 2 in each case is?

• 48

• 50

• 52

• 54

Find the least number of five digit exactly divisible by 12, 15 and 18.

• 10080

• 10060

• 10100

• 10085

Find the greatest possible length which can be used to measure exactly the lengths 4 m 95 cm, 9 m, and 16 m 65 cm.

• 35

• 55

• 45

• 65

Three bells rings at intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together after every ——–?

• 12

• 8

• 14

• 13

The HCF and LCM of two numbers are 12 and 336 respectively. If one number is 84, then the other number is?

• 45

• 42

• 46

• 48

The LCM of two numbers is 495 and their HCF is 5. If sum of the numbers is 100, then find their difference.

• 16

• 10

• 12

• 8

What is the smallest number that has exactly 12 factors?

• 60

• 211

• 180

• 156

How many factors of 2⁴ * 5³ *7⁴ are odd numbers?

• 100

• 20

• 24

• 99

Number N = 2⁶ * 5⁵ * 7⁶ * 10⁷; how many factors of N are even numbers?

• 1890

• 1750

• 1183

• 2000