Mathematics
Observe the following pattern and fill in the blanks:
9 × 9 + 7 = 88
98 × 9 + 6 = 888
987 × 9 + 5 = 8888
9876 × 9 + 4 = …….
98765 × 9 + 3 = …….
Whole Numbers
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Answer
Observing the pattern, each line gives a number consisting of repeated 8.
The number of 8 in the result is equal to the number of digits in the first multiplicand plus 1.
9876 × 9 + 4 = 88888.
98765 × 9 + 3 = 888888.
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Related Questions
(i) Can a rectangular number be a square number?
(ii) Can a triangular number be a square number?
Observe the following pattern and fill in the blanks:
1 × 9 + 1 = 10
12 × 9 + 2 = 110
123 × 9 + 3 = 1110
1234 × 9 + 4 = …….
12345 × 9 + 5 = …….
Look at the following figures made up of dots:
These figures show the arrangement of the numbers 2 × 3 or 3 × 2; 2 × 4 or 4 × 2 i.e. the numbers 6 and 8.
The numbers 6 and 8 are called rectangular numbers. Can you write two more rectangular numbers?
Fill in the blanks:
(i) A whole number is less than all those whole numbers that lie to its …. on the number line.
(ii) One more than a given whole is called its ….
(iii) There is at least one whole number between two …. whole numbers.
(iv) 738 × 335 = 738 × (300 + 30 + ….)
(v) If a is a non-zero whole number and a × a = a, then a = ….
(vi) …. is the only whole number which is not a natural number.
(vii) The additive identity in whole numbers is ….
(viii) …. is the successor of the largest 3-digit number.
(ix) Division of a whole number by …. is not defined.