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Q:

Find the missing number in the following series?

2, 3, 10, 39, ?, 885

A) 128	B) 156
C) 172	D) 189

Answer & Explanation Answer: C) 172

Explanation:

Take a Look at the below sereies

$2 \times 1 + (1^{2}) = 3$

$3 \times 2 + (2^{2}) = 10$

$10 \times 3 + (3^{2}) = 39$

$39 \times 4 + (4^{2}) = 172$

$172 \times 5 + (5^{2}) = 885$

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Filed Under: Number Series

Q:

Find the wrong number in the following series?

1500, 1475, 1448, 1419, 1389, 1355, 1320

A) 1475	B) 1419
C) 1389	D) 1355

Answer & Explanation Answer: C) 1389

Explanation:

Take a look at the below sereies :

1500 - 25 = 1475

1475 - 27 = 1448

1448 - 29 = 1419

1419 - 31 = 1388

1388 - 33 = 1355

1355 - 35 = 1320

It clearly shows 1389 is Wrong Number

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Filed Under: Number Series

Q:

__bam__amb__m__a__bam

A) mbabm	B) abmab
C) mabma	D) ambbm

Answer & Explanation Answer: A) mbabm

Explanation:

Here "mba" is repeated

$m b a m b a m b a m b a m b a m$

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Filed Under: Number Series

Q:

What letters will fill the blank?

Z, X, V, T, R, __,__

A) M, N	B) P, N
C) O, K	D) K, S

Answer & Explanation Answer: B) P, N

Explanation:

Here the letter series is alternative reverse order series. So we get P, N.

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Filed Under: Number Series

Q:

Find the wrong number in the series.

1, 2, 6, 15, 31, 56, 91

A) 31	B) 15
C) 56	D) 91

Answer & Explanation Answer: D) 91

Explanation:

The difference of the two consecutive numbers are 1, 4, 9, 16, 25, 35.

This is clearly , $+ (1^{2}), + (2^{2}), + (3^{2}), + (4^{2}), + (5^{2}), + (6^{2})$

Here 35 is wrong, So our wrong number is 91

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Filed Under: Number Series

Q:

Which Number would come in place of the underline mark in the series.

3, 9, 21, ___ , 93

A) 39	B) 45
C) 48	D) 51

Answer & Explanation Answer: B) 45

Explanation:

First difference is 6 and second is 12. But if we take third as 18, then fourth difference will be 24. Then 93 can not be the last term.

So we have to take the difference as 6, 12, 24 and 48.

So Answer is 21+24 = 45

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Filed Under: Number Series

Q:

If Z= 2197 and R= 729. How would J be written in that code?

A) 216	B) 124
C) 512	D) 125

Answer & Explanation Answer: D) 125

Explanation:

$Z C o d e \Rightarrow 26 \Rightarrow \frac{26}{2} \Rightarrow 13 \Leftrightarrow (13^{3}) = 2197$

$R C o d e \Rightarrow 18 \Rightarrow \frac{18}{2} \Rightarrow 9 \Leftrightarrow (9^{3}) = 729$

Similarly, $J C o d e \Rightarrow 10 \Rightarrow \frac{10}{2} \Rightarrow 5 \Leftrightarrow (5^{3}) = 125$

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Filed Under: Coding and Decoding

Q:

In a certain code language , 'PROBLEM' is written as MPERLOB. How will 'PROBLEM' is written as MPERLOB. How will 'NUMBERS' be written in that code?

A) SNUREMB	B) SNRUBME
C) SNRUEMB	D) SNRUMEB

Answer & Explanation Answer: C) SNRUEMB

Explanation:

$\begin{matrix} 1 & 2 & 3 & 4 & 5 & 6 \\ P & R & O & B & L & E \end{matrix} \begin{matrix} 7 \\ M \end{matrix} \Rightarrow \begin{matrix} 7 & 1 & 6 & 2 & 5 & 3 \\ M & P & E & R & L & O \end{matrix} \begin{matrix} 4 \\ B \end{matrix}$

Similarly, $\begin{matrix} 1 & 2 & 3 & 4 & 5 & 6 \\ N & U & M & B & E & R \end{matrix} \begin{matrix} 7 \\ S \end{matrix} \Rightarrow \begin{matrix} 7 & 1 & 6 & 2 & 5 & 3 \\ S & N & R & U & E & M \end{matrix} \begin{matrix} 4 \\ B \end{matrix}$

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Filed Under: Coding and Decoding

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