CLASS VII
Sample Questions
Q1. Verify a – ( - b ) = a + b if
(I ) a = 21, b = 18 ( ii ) a = 75 ,
b= 84
Q2. If z= 10 then find the value of z3 –
3(z– 10)
Q3. If a = – 1 and , b = – 2 , then find the
value of 2a – 2b – 4 – 5 + a
Q4. Express
3600 as the product of powers of prime factors
Q5. Simplify (i) ( - 2 )3 x ( - 10 )3 (ii)
32 x 104
Q6. Simplify (i) (30 + 20 ) x
50 (ii) (23 x 2 )2
Q7. Use laws of exponents
and write answers in exponential form
(220
÷215 )x 23
(ii) 7x x 72
Q8. Write in 3006194 expanded
form
Q9.
Write 39087.8 in standard form 