Topics

# Find out the missing number. 3, 5, 18, ? , 320

 A) 64 B) 72 C) 84 D) 76

 B) 72

$$\Large 3 \times 1+2 \times 1^{2}=3+2=5$$

$$\Large 5 \times 2+2 \times 2^{2}=10+8=18$$

$$\Large 18 \times 3+2 \times 3^{2}=54+18=72$$

$$\Large 72 \times 4+2 \times 4^{2}=288+32=320$$

Part of solved Number series questions and answers : >> Aptitude >> Number series

Similar Questions
1). Find out the missing number.
3, 10, 19, 30, 43, ? , 75
 A). 10 B). 19 C). 30 D). 58
2). In the series 2, 7, 14, 23, ? 47, the number in the plaee of ? is.
 A). 35 B). 34 C). 33 D). None of these.
3). What is the next number in the series 3, 9, 19, 33 ......
 A). 51 B). 53 C). 55 D). 61
4). $$\Large log_{10}1000$$ =
 A). 3 B). 6 C). 8 D). 10
5). Simplify: $$\Large log_{10}2500$$
 A). 2 B). 1 C). 3 D). 4

6). $$\Large log_{10}2500 - log_{10}25$$
 A). 4 B). 5 C). 2 D). 1
7). Write in terms of indices: $$\Large log_{27}81=\frac{4}{3}$$
 A). $$\Large 3^{4}$$ B). $$\Large 3^{3}$$ C). $$\Large 27^{\frac{1}{3}}$$ D). $$\Large 27^{\frac{2}{3}}$$
8). Slmplify: $$\Large log_{10}4+log_{10}25$$
9). Find the value of $$\Large log_{3}72-log_{3}8$$
10). Find the value of $$\Large 3log_{a}2-log_{a}8$$