Look at this series: VI, 10, V, 11, __, 12, III, ... What number should fill the blank?
A). IV
B). 14
C). II
D). IX
IV
This is an alternating addition and subtraction series. Roman numbers alternate with Arabic numbers. In the Roman numeral pattern, each number decreases by 1. In the Arabic numeral pattern, each number increases by 1.
1. The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ?
4. Find the greatest number which on dividing 3050 and 5200 leaves remainders 7 and 9 respectively.
5. How many numbers up to 200 are divisible by 2 and 3 both?
9. If a + b = 16 and ab = 68, what is the value of a² + b² ?
10. Twenty times a positive integer is less than its square by 96. What is the integer?