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

Question :26

$7{3/4}+5{1/4}+8{1/2}$ = ?

Answer: (b)

? = $7+{3/4}+5+{1/4}+8+{1/2}$

=$(7+5+8)+(3/4+1/4+1/2)$

=$20+({3+1+2}/4)$

=$20+{3/2}=20+1+{1/2}=21{1/2}$

Question :27

741560 + 935416 + 1143 + 17364 = ?

Answer: (a)

? = 741560 + 935416 + 1143 + 17364 = 1695483

Question :28

Rationalizing factor of $(2+√3)$ =

Answer: (c)

Question :29

A bag contains 50P, 25P and 10P coins in the ratio 2:3:4: amounting to Rs 129. Find the number of coins of each type

Answer: (c)

Ratio of amount of coins

$=2/2:3/4:4/10$

= 20 : 15 : 8

Amount of 50p =${129×20}/43 = 60$

Amount of 25p = ${129×15}/43$ = 45

Amount of 10p = ${129×8}/43$ = 24

∴Number of each types of coins

= 60 × 2, 45 × 4, 24 × 10

= 120, 180, 240

Question :30

If 3x + 5y = 44 and 10x–2y=16, what is the value of x?

Answer: (b)

3x + 5y = 44 ...(i)

10x – 2y = 16 ...(ii)

By equation (i) × 2 + equation (ii) × 5 we have

6x + 10y + 50x – 10y = 88 + 80

or, 56x = 168

∴ x = $168/56$ = 3

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