Find the value of: from Quantitative Aptitude SSC - CGL Year 20

Subject

Quantitative Aptitude

Class

SSCCGL Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

When 335 is added to 5A7, the result is 8B2. 8B2 is divisible by 3. What is the largest possible value of A?

  • 8

  • 2

  • 1

  • 1

490 Views

2.

The greatest 4-digit number exactly number by 10, 15, 20 is

  • 9990

  • 9960

  • 9980

  • 9980

164 Views

3.

Which one of the numbers is divisible by 25?

  • 303310

  • 373355

  • 303375

  • 303375

175 Views

4.

Find the sum of:
open parentheses 1 minus fraction numerator 1 over denominator straight n plus 1 end fraction close parentheses space plus space open parentheses 1 minus fraction numerator 2 over denominator straight n plus 1 end fraction close parentheses space plus space open parentheses 1 minus fraction numerator 3 over denominator straight n plus 1 end fraction close parentheses plus...... open parentheses 1 minus fraction numerator straight n over denominator straight n plus 1 end fraction close parentheses

  • n

  • 1 half straight n
  • (n + 1)

  • (n + 1)

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5.

In a class there are'z' students. Out of them 'x' are boys. What part of the class is composed of girls?

  • straight x over 2
  • straight z over straight x
  • 1 minus straight x over straight z
  • 1 minus straight x over straight z
226 Views

6.

If the students of 9th class are arranged in a row of 6, 8, 12 or 16, no student is left behind. Then the possible number of students in the class is

  • 60

  • 72

  • 80

  • 80

322 Views

7.

The unit digit in 3 x 38 x 537 x 1256 is

  • 4

  • 2

  • 6

  • 6

255 Views

8.

If a clock strikes appropriate number of times at each hour, how many times will it strike a day?

  • 300

  • 156

  • 68

  • 68

620 Views

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9.

Find the value of:
square root of 30 plus square root of 30 plus square root of 30 plus....... end root end root end root

  • 5

  • 3 square root of 10
  • 6

  • 6


C.

6

Let space straight x space equals space square root of 30 plus square root of 30 plus square root of 30 plus...... end root end root end root
S.B.S.
straight x squared space equals space 30 plus square root of 30 plus square root of 30 plus square root of 30 plus...... end root end root end root
rightwards double arrow space straight x squared space equals space 30 space space plus space straight x
rightwards double arrow space space straight x squared minus straight x minus 30 space equals space 0
rightwards double arrow space straight x squared minus 6 straight x plus 5 straight x minus 30 space equals space 0
rightwards double arrow space space straight x left parenthesis straight x minus 6 right parenthesis plus 5 left parenthesis straight x minus 6 right parenthesis space equals space 0

rightwards double arrow space left parenthesis straight x minus 6 right parenthesis space left parenthesis straight x plus 5 space right parenthesis space equals space 0
rightwards double arrow space space space straight x space equals space 6 space because space straight x not equal to negative 5

Shortcut Method:
Choose two co-prime factors of 30. i.e .(6, 5) and the select the largest one. i.e. 6.
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10.

The odd term in the sequence
0, 7, 26, 63, 124, 217 is

  • 217

  • 7

  • 26

  • 26

167 Views

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