Study the given pattern carefully and select the number that can replace the question mark (?) in it.
[12, 51, 18 / 8, 13, ? / 26, 12, 12 / 30, 50, 23]
If 1/8 of a pencil is black, half of the remaining pencil is yellow and the remaining 3½ cm of the pencil is blue, then what is the total length of the pencil?
The electricity bill of a certain establishment is partly fixed and partly variable depending on the number of units of electricity consumed. In a certain month when 540 units were consumed, the bill was ₹1,800. In another month when 620 units were consumed, the bill was ₹2,040. If in a month 500 units are consumed, then the bill for that month will be:
