UPSC Prelims 2019 · CSAT (Paper 2) · Q33
Basic Numeracy
Hard · Digit reversal ratio
The ratio of a two-digit natural number to the number formed by reversing its digits is 13:31. The number of such pairs is
UPSC Prelims 2019 · CSAT (Paper 2) · Q33
Hard · Digit reversal ratio
The ratio of a two-digit natural number to the number formed by reversing its digits is 13:31. The number of such pairs is