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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Calculations › Calculations Worksheet-2

Calculations Worksheet-2

Calculations 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

 

  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)