Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Solve each of the following Cryptarithm:

 A B
+3 7
 9 A

Find which of the following number is  cube of rational number \[\frac{125}{128}\] .

Find which of the following number is  cube of rational number 0.001331 .

Find which of the following number is  cube of rational number 0.04 .

Solve each of the following Cryptarithm:

  A 1
+ 1 B
  B 0

Solve each of the following Cryptarithm:

  2 A B
+ A B 1
  B 1 8

Solve each of the following Cryptarithm:

  1 2 A
+ 6 A B
  A 0 9

Solve each of the following Cryptarithm:

  A B 7
+ 7 A B
  9 8 A

Show that the Cryptarithm

Find the cube rootsof the following number by successive subtraction of number:
1, 7, 19, 37, 61, 91, 127, 169, 217, 271, 331, 397, ... 64 .

Find the cube root of the following number by successive subtraction of number:
1, 7, 19, 37, 61, 91, 127, 169, 217, 271, 331, 397, ... 512 .

Find the cube root of the following number by successive subtraction of number:
1, 7, 19, 37, 61, 91, 127, 169, 217, 271, 331, 397, ... 1728 .

Fill in the blanks:
The product of two positive rational numbers is always .....

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The product of a positive rational number and a negative rational number is always .....

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The product of two negative rational numbers is always .....

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The reciprocal of a positive rational number is .....

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The reciprocal of a negative rational number is .....

Zero has ______ reciprocal.

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The product of a rational number and its reciprocal is .....

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 The numbers ..... and ..... are their own reciprocals.