Following on from yesterday’s set of lists, here are some challenges involving things that begin with the letter O (including countries, capital cities and chemical elements) or come 15th numerically (such as the 15th Pope and the 15th President of the USA). In each case you can test yourself first to see how many you can name. The answers appear at the end of this piece.

Challenge: Items beginning with O

Countries: there is only 1 country whose usual English name begins with O.

Capital cities: there are 3.

Chemical Elements: there are 3 elements that begin with O; their chemical symbols also begin with O.

UK #1 Chart Acts: 17 acts beginning with O have reached #1 in the UK charts. Well done if you can name 10 of them.

Songs beginning with O that have reached #1 in the UK Chart: Over 30 songs beginning with O have made it to #1 in the UK. Well done if you can name 15 of them.

Challenge: 15th in a list

Can you name the following?

The 15th Pope (199AD to 217AD).

The 15th President of the USA (1857-1861).

The winner of Superbowl XV (1981).

The host country and winner of the 15th FIFA World Cup (1994).

Answers: Items beginning with O

Countries (1): Oman.

Capital cities (3): Oslo (Norway), Ottawa (Canada), Ouagadougou (Burkina Faso).

Chemical elements by name (3): oganesson (Og), osmium (Os), oxygen (O).

UK #1 Chart Acts: Oasis, Odyssey, Offspring, Olive, Oliver Heldens and Becky Hill, Olivia Newton-John & The Electric Light Orchestra, Olly Murs, OMI, One Direction, OneRepublic, Orson, Osmonds, Outhere Brothers, Overlanders, Owl City, Oxide & Neutrino, Ozzy & Kelly Osbourne.

Songs beginning with O that have reached #1 in the UK Chart: “Ob-La-Di Ob-La-Da” / “Obviously” / “Official BBC Children In Need Medley” / “Oh Boy” / “Oh Carolina” / “Oh Julie” / “Oh Mein Papa” / “Oh Pretty Woman” / “OMG” / “On the Floor” / “On The Rebound” / “On The Streets Where You Live” / “Once” / “The One And Only” / “One Dance “ / “One Day At A Time” / “One Day In Your Life” / “One Kiss” / “One Moment In Time” / “One Night” / “One Way or Another (Teenage Kicks)” / “Only Girl (In The World)” / “Only Sixteen” / “Only The Lonely” / “The Only Way Is Up” / “Only You” / “Ooh Aah … Just A Little Bit” / “Oops! … I Did It Again” / “Oopsy Daisy” / “Orinoco Flow” / “Out Of Time” / “Outside Of Heaven” / “Over And Over”.

Answers: 15th in a list

15th Pope: Zephyrinus (199AD to 217AD).

15th President of the USA: James Buchanan (1857-1861).

The winner of Superbowl XV (1981): Oakland Raiders.

The 15th FIFA World Cup (1994): hosted by USA, won by Brazil.