Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:
If $(1001 \times 111)=110000+(11 \times$ $\_\_\_\_$ ), then the number in the blank space is
(a)121
(b)211
(c)101
(d)1111
Answer
Answer (as printed): C
Explanation
Let the blank space is x \ 1001 × 111 = 110000 + 11x Now find the value of x (1000 + 1) × 111 = 110000 + 11x 111000 + 111 = 110000 + 11x 111111 = 110000 + 11x 11x = 111111 – 110000 11x = 1111 1111 x = = 101 11
Explanation as extracted from the printed page; notation may be imperfect.