Question 1

What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.) 21.003 × 39.998 –209.91 = 126× ?

Accepted Answer

Take nearest values21.003 × 39.998 –209.91 = 126× ?630 = 126× ?? = 5 (approx)

Question 2

What approximate value should come in place of the question mark (?) in the following equation (Note: You are not expected to calculate the exact value)? [(7.99)2–(13.001)2+(4.01)3]2=?

Accepted Answer

[(7.99)^2–(13.001)^2+(4.01)^3]^2= X X= [8^2-13^2+4^3]^2 X= [64-169+64]^2 X= [-41]^2 X=1681

Question 3

In the given questions, two equations numbered I and II are given. Solve both the equation and mark the appropriate answer. I. x2–5x –24 = 0II. 2y2+ 19y + 35 = 0

Accepted Answer

x^2–5x –24 = 0 (x-8) (x+3) x = 8, -3 II. 2y^2+ 19y + 35 = 0 (2y+7) (y+7)y= -7, -5/2 So can’t be determined

Simplification Questions