Numeracy (1st CA) Grade 6

Which of these is NOT a prime number?

• 17

• 33

• 23

• 19

If numbers p and q are even numbers, then which of these would be an odd number?

• p + q

• p x q

• 2p + 5q

• p - q - 1

Which of the following are two common factors of 24 and 36?

• 4, 8
• 10, 14
• 6, 12
• 18, 20

What is the product of the first 5 prime numbers?

• 2000
• 1200
• 2310
• 1500

Multiply 1101​ by 101​.
NB: numbers are in base 2

• 1010100

• 110011

• 1000001

• 1110011

What is the highest number that can divide 36, 54, and 72 exactly without a remainder?

• 9
• 18
• 12
• 6

Which of the following is not a multiple of 12 but a multiple of 6?

• 30
• 12
• 48
• 24

Which one of the following is FALSE?

• The product of two odd numbers is odd.

• The sum of two even numbers is even

• The number 2 is the only even prime number

• All prime numbers are odd

Four bells ring at intervals of 10 minutes, 5 minutes, 15 minutes, and 20 minutes respectively. If they all rang together at 9:00 am, what time will they all ring together again

• 11:00 am
• 10:30 am
• 10:00 am
• 9:30 am

Divide the LCM of 18 and 30 by its HCF.

• 20

• 25
• 15

• 10