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Home › Grade8 › OLYMPIAD › Math Olympiad-Grade-8 › Numbers › Numbers Worksheet-2

Numbers Worksheet-2

Numbers Worksheet-2

 

  1. 8756 × 99999 = ?

(a) 796491244                              (b) 815491244

(c) 4691100843                            (d) 584649125

 

  1. The value of 112 × 54 is :

(a) 6700             (b) 70000          (c) 76500           (d) 77200

 

  1. 935421 × 625 = ?

(a) 575648125                               (b) 584638125

(c) 584649125                               (d) 585628125

 

  1. 12846 × 593 + 12846 × 407 = ?

(a) 12846000                                (b) 14203706

(c) 24038606                                (d) 24064000

 

  1. 1014 × 986 = ?

(a) 998804       (b) 998814        (c) 998904        (d) 999804

 

  1. 1307 × 1307 = ?

(a) 1601249       (b) 1607249      (c) 1701249       (d) 1708249

 

  1. 1399 × 1399 = ?

(a) 1687401       (b) 1901541       (c) 1943211        (d) 1957201

 

  1. 106 × 106 + 94 × 94 = ?

(a) 20032          (b) 20072          (c) 21032           (d) 23032

 

  1. 217 × 217 + 183 × 183 = ?

(a) 79698          (b) 80578          (c) 80698          (d) 81268

 

  1. 12345679 × 72 is equal to :

(a) 88888888                              (b) 888888888

(c) 898989898                            (d) 999999998

 

  1. What number should replace x in this multiplication problem ?

(a) 0                    (b) 2                    (c) 4                    (d) 5

 

  1. A positive integer, which when added to 1000, gives a sum which is greater than when it is multiplied by 1000. This positive integer is :

(a) 1                     (b) 3                    (c) 5                    (d) 7

 

  1. Which of the following can be a product of two 3 - digit numbers **3 and **8 ?

(a) 1010024      (b) 991014         (c) 9124              (d) None of these

 

  1. A boy multiplies 987 by a certain number and obtains 559981 as his answer. If in the answer, both 9's are wrong but the other digits are correct, then the correct answer will be:

(a) 553681         (b) 555181         (c) 555681         (d) 556581

 

  1. When a certain number is multiplied by 13, the product consists entirely of fives. The smallest such number is :

(a) 41625           (b) 42135           (c) 42515            (d) 42735

 

  1. The number of digits of the smallest number, which when multiplied by 7 gives the result consisting entirely of nines, is :

(a) 3                    (b) 5                    (c) 6                    (d) 8

 

  1. –95 ¸ 19 = ?

(a) –5                 (b) –4                 (c) 0                    (d) 5

 

  1. What should come in place of * mark in the following equation ?

1*5$4 ÷ 148 = 78

(a) 1                     (b) 4                    (c) 6                    (d) 8

(e) None of these

 

  1. The sum of all possible two–digit numbers formed from three different one–digit natural numbers when divided by the sum of the original three numbers is equal to :

(a) 18                  (b) 22                 (c) 36                  (d) None of these

 

  1. If n is a negative number, then which of the following is the least ?

(a) 0                    (b) –n                 (c) 2n                  (d) n2

 

Answer Key:

(1)-c; (2)-b; (3)-b; (4)-a; (5)-d; (6)-d; (7)-d; (8)-b; (9)-b; (10)-b; (11)-a; (12)-a; (13)-b; (14)-c; (15)-d; (16)-c; (17)-a; (18)-a; (19)-b; (20)-c