Quantitative Aptitude - Arithmetic Ability Questions

Q:

Find the missing number in the series

1, 6,  ?, 15, 45, 66, 91

A) 24 B) 28
C) 32 D) 26
 
Answer & Explanation Answer: B) 28

Explanation:

Here the given series 1, 6,  ?, 15, 45, 66, 91 follows a

Pattern in the series is, +5, +9, +13,...,.. +21, +25

So +4 is getting increased at every term addition.

Missing Number in the series will be 15+(9+4) = 15 + 13 = 28.

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Filed Under: Odd Man Out
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7 52803
Q:

A rectangular block 6 cm by 12 cm by 15 cm is cut up into an exact number of equal cubes. Find the least possible number of cubes.

A) 30 B) 40
C) 10 D) 20
 
Answer & Explanation Answer: B) 40

Explanation:

Volume of the block = (6 x 12 x 15) cu.cm = 1080 cu.cm 

Side of the largest cube = H.C.F. of 6 cm, 12 cm, 15 cm 

                                   = 3 cm.

 

Volume of this cube  = (3 x 3 x 3) cu.cm = 27 cu.cm 

Number of cubes =108027 = 40.

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128 52734
Q:

A sum of Rs. 427 is to be divided among A, B and C such that 3 times A’s share, 4 tunes B’s share and 7 times C’s share are all equal. The share of C is :

A) 84 B) 140
C) 196 D) 240
 
Answer & Explanation Answer: A) 84

Explanation:

3A = 4B = 7C = k,Then A = k/3, B = k/4 and C= k/7.

A : B : C = k/3 : k/4 : k/7 = 28:21 :12.

Cs share = Rs. [427 x (12/61)] = Rs. 84

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Filed Under: Ratios and Proportions

183 52625
Q:

How many days are there in x weeks x days?

A) 7x * x B) 8x
C) 14x D) 7
 
Answer & Explanation Answer: B) 8x

Explanation:

x weeks x days = (7x + x) days = 8x days.

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Filed Under: Calendar

303 52564
Q:

A is a working and B is sleeping partners in a business. A puts in Rs. 5000 and B puts in Rs.6000. A receives % of the profit for managing the business and the rest is divided in proportion to their capital. What does each get out of a profit of Rs. 880?

Answer

Total profit = Rs. 880


A's share for managing the business i.e 


\inline 12\frac{1}{2} %  =  \inline \frac{25\times 880}{200}=Rs.110


Remaining profit of A and B as per their capital = 880 - 110 = Rs. 770


Ratio of amounts = 5000 : 6000 = 5 : 6


Sum of ratios = 5 + 6 = 11


A's share = \inline 770\times \frac{5}{11}= Rs.350


A's total share = 350 + 110 = Rs. 460


B's share = \inline 770\times \frac{6}{11}=Rs.420

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Subject: Partnership

85 52360
Q:

Solve the following :

 

(-4){19 - (-2) x (-8)} = ?

A) 12 B) -140
C) 140 D) -12
 
Answer & Explanation Answer: D) -12

Explanation:
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Filed Under: Simplification
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0 52275
Q:

The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

A) 74 B) 94
C) 184 D) 364
 
Answer & Explanation Answer: D) 364

Explanation:

L.C.M. of 6, 9, 15 and 18 is 90.

 

Let required number be 90k + 4, which is multiple of 7.

 

Least value of k for which (90k + 4) is divisible by 7 is k = 4.

 

=>Required number = (90 x 4) + 4   = 364.

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Filed Under: HCF and LCM

88 52199
Q:

What should come in place of question mark (?) in the following question?

65% × 700 + √196 – 9 × 3 = ?

A) 522 B) 442
C) 402 D) 362
 
Answer & Explanation Answer: B) 442

Explanation:

As per the BODMAS rule, Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order.

65% × 700 + 14 - 9 × 3 65 × (700/100) + 14 - 27 455 + 14 - 27 = 442

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Filed Under: Simplification
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