alleryStart learning →Who showed in 1963 that a symmetric n-set drawing forces n to be prime?
ADavid Henderson
BJohn Venn
CSun-Joo Shin
DPeter Hamburger
Answer & Solution
Correct answer: A. David Henderson
David Wilson Henderson proved in 1963 that n-fold rotational symmetry implies a prime n.
Keep practising Venn Diagrams
Browse all Venn Diagrams questions for SSC CGL, or explore more Reasoning topics.
Related questions
In a school of 400, 250 take art, 180 take music and 60 take both. How many take only musiA group of 100 has 60 who swim, 45 who cycle and 15 who do neither. How many do both?Which set of classes fits three completely separate circles with nothing shared?Which set of classes fits one circle nested in a second and the second nested in a third?If P = {1, 2, 3, 4, 5} and Q = {4, 5, 6, 7}, how many elements lie in P but not in Q?Let A = {a, b, c, d} and B = {c, d, e}. How many elements are in the intersection of A andThose in only one of two sets number 24 and those in both number 8. How many belong to theIf 45 people like tea and 18 of them also like coffee, how many like tea but not coffee?