LEVEL-2 | SESSION 5| Special Pattern of Multiplication

The shortcut 67 × 47 = 3149 works because:

• 6 + 4 = 10 and 7 = 7

• Both numbers end with 7

• 6 × 4 = 24, then add 7

• All of the above

For which pair is this shortcut applicable?

• 64 × 36

• 53 × 43

• 74 × 34

• 38 × 28

If the final result of 67 × 47 is 3149, the digits '49' come from:

• 6 × 4

• 6 + 4

• 7 × 7

• 4 + 9

A student says this method works for 35 × 65. What is the error?

• Units aren’t same

• No error

• Tens don’t add to 10

• Both A and B

67 × 47 = ?

• 3149

• 3049

• 3109

• 3119

What is the result of 74 × 34 using the shortcut method?

• 2516

• 2508

• 2526

• 2506

Which of the following pairs can be calculated using the same shortcut?

• 82 × 18

• 45 × 65

• 72 × 28

• 56 × 44

84 × 24 = ?

• 1620

• 1616

• 2016

• 2116

63 × 43 = ?

• 2409

• 2790

• 279

• 2709

38 × 78 = ?

• 2116

• 2916

• 2964

• 2164