Mathematics 7. QA1

Express 504 as product of prime factors.

• 
  

  $2^3\times3^2\times7$
  

• $2^2\times3^2\times7$

• $2\times3^3\times7^2$

• $2^2\times3^2\times7^2$

Rewrite

 $7\times7\times13\times17\times17\times71$  in index form.

•  $7^2\times17^2\times71$  

•  $7\times13\times17^2\times71$  

•  $7^2\times17^2$  

•  $7^2\times13\times17^2\times71$  

The largest prime number less than 123.

• 121

• 119

• 113

• 117

What is the highest common factor of 60 and 96?

• 6

• 12

• 18

• 24

The HCF of two numbers is 12. If the sum of the two numbers is 72, find the two numbers.

• 12 and 60

• 50 and 22

• 40 and 32

• 8 and 64

Find the LCM of 35, 420 and 245.

• 2,900

• 2,940

• 2,950

• 2,970

The LCM of 6 and a certain number is 24. Find the numbers. (If there is more than 1 answer, give the smallest number)

Mary earned 500 pesos and spent 580 pesos. How much did she save?

 $-8$  ______ $-1$  

•  $>$  

•  $<$  

•  $=$  

 $-34\ -\ \left(-74\right)=$