NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 1: Number System

Fill in the Blanks

99.

(a) 10 million = ____ crore.

(b) 10 lakh = ____ million.

100.

(a) 1 metre = ____ millimetres.

(b) 1 centimetre = ____ millimetres.

(c) 1 kilometre = ____ millimetres.

101.

(a) 1 gram = ____ milligrams.

(b) 1 litre = ____ millilitres.

(c) 1 kilogram = ____ milligrams.

100 thousands = ____ lakh.

Height of a person is 1m 65cm. His height in millimetres is ____.

Length of river Narmada is about 1290 km. Its length in metres is ____.

The distance between Srinagar and Leh is 422 km. The same distance in metres is ____.

Writing of numbers from the greatest to the smallest is called an arrangement in ____ order.

By reversing the order of digits of the greatest number made by five different non-zero digits, the new number is the ____ number of five digits.

By adding 1 to the greatest ____ digit number, we get ten lakh.

The number five crore twenty three lakh seventy eight thousand four hundred one can be written, using commas, in the Indian System of Numeration as ____.

In Roman Numeration, the symbol X can be subtracted from ____, M and C only.

The number 66 in Roman numerals is ____.

The population of Pune was 2,538,473 in 2001. Rounded off to nearest thousands, the population was ____.

The smallest whole number is ____.

Successor of 106159 is ____.

Predecessor of 100000 is ____.

400 is the predecessor of ____.

____ is the successor of the largest 3 digit number.

If 0 is subtracted from a whole number, then the result is the ____ itself.

The smallest 6 digit natural number ending in 5 is ____.

Whole numbers are closed under ____ and under ____.

Natural numbers are closed under ____ and under ____.

Division of a whole number by ____ is not defined.

Multiplication is distributive over ____ for whole numbers.

2395 × ____ = 6195 × 2395

1001 × 2002 = 1001 × (1001 + ____)

10001 × 0 = ____

2916 × ____ = 0

9128 × ____ = 9128

125 + (68+17) = (125 + ____) + 17

8925 × 1 = ____

19 × 12 + 19 = 19 × (12 + ____)

24 × 35 = 24 × 18 + 24 × ____

32 × (27 × 19) = (32 × ____) × 19

786 × 3 + 786 × 7 = ____

24 × 25 = 24 × ____

A number is a ____ of each of its factor.

____ is a factor of every number.

The number of factors of a prime number is ____.

A number for which the sum of all its factors is equal to twice the number is called a ____ number.

The numbers having more than two factors are called ____ numbers.

2 is the only ____ number which is even.

Two numbers having only 1 as a common factor are called ____ numbers.

Number of primes between 1 to 100 is ____.

If a number has ____ in ones place, then it is divisible by 10.

A number is divisible by 5, if it has ____ or ____ in its ones place.

A number is divisible by ____ if it has any of the digits 0, 2, 4, 6, or 8 in its ones place.

If the sum of the digits in a number is a ____ of 3, then the number is divisible by 3.

If the difference between the sum of digits at odd places (from the right) and the sum of digits at even places (from the right) of a number is either 0 or divisible by ____, then the number is divisible by 11.

The LCM of two or more given numbers is the lowest of their common ____.

The HCF of two or more given numbers is the highest of their common ____.