Practice Questions

12.5% of 4960 + ?% of 2400 = 1580

620 + ? × 24 = 1580

? × 24 = 960

? = 960/24 = 40

?% of 600 – 120 = 8² + 4² 

?/100 × 600 - 120 = 64 + 16

?/100 × 600 - 120  = 80

?/100 × 600 =80+120= 200

?/100 = 200/600 = 1/3

? = 100/3

{(452 – 214 + 72) / 5} × 2 = ?

? = (310 / 5) × 2

? = 62 × 2

? = 124

30% of 150 = 15% of ? + 20% of 180

0.15 × ? + 0.20 × 180 = 0.30 × 150

0.15 × ? + 36 = 45

0.15 × ? = 9

? = 9/0.15

? = 60

√225 + √729 – √324 = 20% of ?

15 + 27 - 18 = 20/100 × ?

24 = 1/5 × ?

? = 24 × 5

= 120

125 + ? + 272 – 391 = 184 – 215 + 169

? + 397 – 391 = 353 – 215

? + 6= 138

?= 138 – 6

? = 132

[{(4608 ÷ 24) ÷ 12} ÷ 4] + 11² + √169 

= [{192 ÷ 12} ÷ 4] + 11² + √169 

= [ 16 ÷ 4 ] + 11² + √169 

= 4 + 121+ 13

= 138

[{(4608 ÷ 24) ÷ 12} ÷ 4] + 112 + √169 

= [{192 ÷ 12} ÷ 4] + 112 + √169 

= [ 16 ÷ 4 ] + 112 + √169 

= 4 + 112 + 13

= 129

221 ÷ 23.6 × 94.4 ÷ 169 ÷ 17 = ? ÷ 91

? = 28

(7770 ÷ 70) + (1500 ÷ 25) + (1008 ÷ 28) + 2152 =


= 111 + 60 + 36 + 2152

= 2359

(12121 ÷ 100) + (42424 ÷ 50) 

= 121.21 + 848.48

= 969.69

(913 + 329 + 522 + 343) / (18 + 24 – X + 18) = 43

X = 11

(5.25 × 6 × 4) ÷ 7 – 2 = ?^2

126/7 - 2 = ?^2

18 - 2 = ?^2

?^2 = 16

? = 4

1/4 × (4856 × 0.5) × 12 =

= 1/4 × 2428 × 12

= 7284

(3/8) × 240 + 160 ÷ 5 = ?

90 + 32 = ?

? = 122

21 + 13 – 196 + 208 = (?)

(?) = 34 + 12

(?) = 46

2% of 1250 – 12.2% of 500 = ? – 87

=> 315 – 61 = ? – 87

=> 254 + 87 = ?

=> 341

1/7 × 168 + 1/3 × 144 = ? + 28 

=> 24 + 48 = ? + 28 

=> 44

120 + 140 ÷ 20 = 254 ÷ ?

=> 120 + 7 = 254 ÷ ?

=> 2

? of 85 + 210 + 5 = 555

=> ? × 85 = 555 – 215

=> 4

(3/8) + 2(1/24) + (1/16) = ? * 17/48

(18 + 98 + 3)/48 = ? * 17/48

? = 7

23 ÷ 345 * 468 ÷ 39 * ? = 4

1/15 * 12 * ? = 4

? = 5

35 × 12 + 42 × 32 = ?

420 + 1344 = ?

? = 1764

√(25% of 64 × 16) + 40 

= √(25/100 × 64 × 16) + 40

= √(1/4 × 64 × 16) + 40

= 16 + 40

= 56

5.51 ÷ 0.0019

= {551 ÷ 100}/{19 ÷ 1000}


= 551 × 100/19

= 2900

24 ÷ 4 ×(3 +3) ÷2 

= 24 ÷ 4 × 6   ÷2 

= 6  × 6   ÷2 

= 18

25% of 890 + 29% of 383 - 22% of 1422 = ?

25(890)/100 + 29(383)/100 - 22(1422)/100 = ?

222.5 + 111.07 - 312.84 = ?

20.73 = ?

18 ÷ 9 × 4 + 36 of 6 ÷ 1 – 42

⟹ 2 × 4 + 216 – 42

⟹ 224 – 42 = 182

75 of 3 + (49 ÷ 7) × 6 + 105 ÷ 15 of 7

⟹ 225 + 7 × 6 + 1

⟹ 225 + 42 + 1 = 268

768 ÷ 8 of 6 × [126 ÷ 9 × (19 – 5) of 26 – (9-4)] ÷ 3

⟹ 768 ÷ 48 × [14 × 364 – 5] ⟹ 16 × 5091 ÷ 3 = 16 × 1697 = 27152

(320 + 342 + 530 + 915) ÷ (20 + 22 – x + 18) = 43

⟹ 2107= 43 × (60-x)

⟹ x = 60 – 49

⟹ x = 11

2.5 × 2 + 3 ÷ 3 + 6 

= 5 + 1 + 6

= 12

25-[7+{27-(18-6)}]

= 25-[7+{27-12}]

= 25-[7+15]

= 25-22

= 3

(⅖) × 5 ¼

Here, 5 ¼ is a mixed fraction.

Let us convert this mixed fraction into an improper fraction.

5 ¼ = [(5 × 4) + 1]/4 = 21/4

Thus, (⅖) × 5 ¼ = (⅖) × (21/4) = 21/10

5/129

Here, numerator = 5

Denominator = 129

Reciprocal of 5/129 = 129/5

The product of 5/129 and its reciprocal = (5/129) × (129/5) = 1.

2 x ? - 6 = 676/26

 2 x ? - 6 = 26

2 x ? = 26 + 6 = 32

? = 32/2 = 16

4/5 ÷ 2/3

= 4/5  × 3/2

= 12/10

= 6/5

Convert each fraction to a decimal to easily compare:

2/3 = 0.666...

3/4 = 0.75

5/6 = 0.833...

7/8 = 0.875

As we know a number with unit digit 2 have repeating cycle of 2,4,8,6 after every fourth power as power is 173 or (172+1) where till 172 , 43rd cycle will get complete and next unit digit will be 2

Unit digit of a product = Unit digit of the product of unit digits of individual number

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