Directions:(1-5) Find the wrong term in the series given below.

1. 59, 69, 90, 125, 169, 229

Ans:5
The pattern is as follows:59 + 10 = 69

69 + 10+ 11 = 90

90 + 10+ 11+ 12 = 123

123 + 10+ 11+ 12+ 13 = 169

169 + 10+ 11+ 12+ 13+ 14 = 229

 

2. 10, 22, 46, 96, 190, 382

Ans:5
The pattern is as follows:10 x 2 + 2 = 22

22 x 2 + 2 = 46

46 x 2 + 2 = 94

94 x 2 + 2 = 190

190 x 2 + 2 = 382

 

3. 704, 688, 652, 588, 490, 344

Ans: 4
The pattern is as follows:704 – 42 = 688

688 – 62 = 652

652 – 82 = 588

588 – 102 = 488

488 – 122 = 344

 

4. 99, 53, 27, 15, 9, 6

Ans:3
The pattern is as follows:(99 + 3) / 2 = 51

(51 + 3) / 2 = 27

(27 + 3) / 2 = 15

(15 + 3) / 2 = 9

(9 + 3) / 2 = 6

 

5. 42, 70, 106, 152, 202

Ans:2
The pattern is as follows:62 + 6 = 42

82 + 6 = 70

102 + 6 = 106

122 + 6 = 150

142 + 6 = 202

 

Directions:(6-10) What should come in place of the question mark (?) in the following number series?

6. 2 ,9, 30, 105 ,436, ?

Ans:2
The pattern is:(2+7)x1 = 9, (9+6)x2 = 30, (30+5)x3 = 105, (105+4)x4=436, (436+3)x5 = 2195

 

7. 1237 ,1547 ,2158, 2471, 3079, ?

Ans:3
In every term, the first two digits are formed by adding the first two digits of the previous number to the sum of their digits. Same is true for the last two digits as well.(12+1+2)(37+3+7) = 1547, (15+1+5)(47+4+7) = 2158, (21+2+1)(58+5+8) = 2471, (24+2+4)(71+7+1) = 3079.

Hence next term (30+3+0)(79+7+9) = 3395

 

8. 828, 280, 75 ,21 ,10.5 ,?

Ans: 2
828/3 + 4 = 280, 280/4 + 5 = 75, 75/5 + 6 = 21, 21/6 + 7 = 10.5, 10.5/7 + 8 = 9.5

 

9. 39.48, 40.59, 42.81, 46.14, ?

Ans:1
39.48+1.11=40.59, 40.59+2.22=42.81, 42.81+3.33=46.14, 46.14+4.44=50.58

 

10. 97 95 91 83 78 ?

Ans:3
The next term is obtained by subtracting the difference of digits from the number.97-2 = 95, 95-4 = 91, 91 – 8 = 83, 83 – 5 = 78, 78-1=77

 

Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

13 thoughts on “Number Series”

  5. Marcos

    You actually make it seem really easy with your presentation but I find this topic to be actually
    one thing which I believe I’d never understand. It seems
    too complicated and very vast for me. I’m looking ahead
    for your subsequent submit, I’ll attempt to get the cling of it!
    Lista escape roomów

  9. Apolonia Ege

    Hello I am so grateful I found your website, I really found you by mistake, while I was browsing on Bing for something else, Anyhow I am here now and would just like to say thanks for a remarkable post and a all round interesting blog (I also love the theme/design), I don’t have time to read it all at the minute but I have saved it and also included your RSS feeds, so when I have time I will be back to read more, Please do keep up the excellent work.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top