simplification Model Questions & Answers, Practice Test for ibps so prelims 2023

Question :1

8 + 18 × 368 ÷ 16 = ?

Answer: (d)

?=$8+{({18×368}/16)}$

= 8 + 414 = 422

Question :2

$7^{1/4}$ × $(343)^0.25$ = ?

Answer: (a)

$(7)^{1/4} × (343)^{0.25} = (7)^{1/4} × (7^3 )^{1/4} = (7^4 )^{1/4}$ = 7

Question :3

5986 – 2340 = 1496 + ?

Answer: (c)

5986 – 2340 = 1496 + ?

⇒3646 = 1496 + ?

⇒? = 3646 – 1496 =2150

Question :4

If a is a natural number then $a^2+1/a^2$ is always greater than or equal to

Answer: (d)

'a' is a natural number.

$a^2+1/a^2=a^2+1/a^2-2+2$

$=a^2+1/a^2-2.a.1/a+2$

$a^2+1/a^2=(a-1/2)^2+2$

Now,$(a-1/a)^2$ is always greater than or equal to zero

$∴a^2+1/a^2≥2$

Question :5

$8{2/5} ÷ 10{2/25}$ = ?

Answer: (c)

? = $8{2/5}÷10{2/25}$

= ${42/5}÷{252/25}$

= $42/5 ×25/252=5/6$

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