Direction: What approximate value should come in the place of question mark (?) in the following questions?
Important for :
1
196.1 × 196.1 × 196.1 × 196.1 × 4.01 x 4.001 × 4.999 × 4.999 = (196.1)4 × 4 × ?
» Explain it
A
196.1 × 196.1 × 196.1 × 196.1 × 4.01 × 4.001 × 4.999 × 4.999 = (196.1)4 × 4 × ?

or,  4 × ? = 4.01 × 4.001 × 4.999 × 4.999

or,  ? ≈ 4 × 5 × 5 = 100

Hence, option A is correct.

2
(2 / 7) × (1 / 8) + (3 / 7) ÷ (6 / 14) = ?
» Explain it
C
? = (2 / 7) × (1 / 8) + (3 / 7) ÷ (6 / 14)

= (2 / 7) × (1 / 8) + (3 / 7) × (14 / 6) = (1 / 28) + 1

Hence, option C is correct.

3
10.12.01 + 2.93.001 = ?
» Explain it
A
? = (10.1)2.01 + (2.9)3.001 ≈ (10)2 + (3)3

= 100 + 27 ≈ 130

Hence, option A is correct.

4
√(1999.9997) = 4.76 × ?
» Explain it
D
4.76 × ? = √(1999.9997)

4.76 × ? = 44.72

or, ?  ≈  9

Hence, option D is correct.

5
23% of 4011 + (1 / 7) of 5555 = ?
» Explain it
D
? = 23% of 4011 + (1 / 7) of 5555

? =  922.53 + 793.57  ≈  1700.

Hence, option D is correct.

### Simplification and Approximation PDF for SBI Clerk 2021, IBPS Clerk 2021

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