# Calculation of Unit Digit

Calculation of Unit Digit

Can you find the unit digit of the product 227 × 679 × 763 × 899 in less than 20 seconds. Watch this video and learn the short trick. The trick discussed here is useful for  CAT, Bank P O, GMAT, Math Olympiad and other entrance exams. Session by Alka Maheshwari

1. Find the unit’s digit of the expression 111 + 122 + 133 + 144 + 155 + 166.

1. 1                             2. 9                             3. 7                             4. 0

1. Find the unit’s digit of the expression 111 × 122 × 133 × 144 × 155 × 166?

1. 1                             2. 9                             3. 7                             4. 0

1. Find the unit’s digit of the expression : 55725 + 735810 + 22853.

1. 4                             2. 0                             3. 2                             4. 6

1. Find the units digit of:

1111!+1 + 1212!+2 + 1313!+3 + 1414!+4 + ... + 1919!+9

1. 0                             2. 8                             3. 7                             4. 6

1. In the number 1604320, after how many digits from the right will you encounter the first odd digit ?

1. 4320                     2. 4321                     3. 4322                     4. 4323