Answer-The unit’s digit in the product 1771 × 2663 × 3365 is

71 7, 72 49, 73 343, 74 2401 31 3, 32 9, 33 27, 34 81 i.e. the digit at units place gets repeated after power 4. Unit 6 remains same for any power. Required units digit Units digit in the product of 73 6 31 4