Who is the fastest Indian to reach 50 ODI wickets?

Rohit Sharma and Virat Kohli shared their fourth double-century partnership in ODIs the other day. Was this a record? asked Jamie Stewart from Canada
That's a good spot, as the stand of 230 between Rohit Sharma and Virat Kohli in Kanpur at the weekend made them the first pair to share four stands of 200-plus in one-day internationals. Kohli has also had three with Gautam Gambhir, while Sourav Ganguly and Sachin Tendulkar also shared three double-century partnerships. The only non-Indian pair with as many is Sri Lanka's Mahela Jayawardene and Upul Tharanga.

Which two players have opposed each other in the most Test matches? asked Graham Montague from England
The clear leaders here are Allan Border of Australia and England's David Gower, who were on opposite sides in 39 Test matches between 1978-79 and 1990-91. That's six more than any other pairing: Syd Gregory and Archie MacLaren met in 33 early Ashes Tests, while Ian Bell and Michael Clarke also locked horns in 33 such matches. The most outside the frequent rivalry of the Ashes is 31 Tests, by Border and Desmond Haynes of West Indies. Don Bradman only played 52 Test matches, but was up against Wally Hammond in 31 of them.

The one-day international record is held by Sachin Tendulkar and Sanath Jayasuriya, who opposed each other in 71 matches; next come Border and Haynes, with 60. In Twenty20 internationals it's 14, by Tillakaratne Dilshan and Shahid Afridi.

Was David Miller's hundred at Potchefstroom the fastest in a Twenty20 international? asked John Campbell from South Africa
David Miller's century against Bangladesh in Potchefstroom at the weekend smashed the record for the fastest century in T20Is. It came up from just 35 balls - nine of which he clubbed for six - which was a full ten deliveries quicker than the old record, set by another South African, Richard Levi, against New Zealand in Hamilton in February 2012. That was Levi's second match, and he only played 11 more, in which he passed 19 only once. Next, at 46 balls, come Faf du Plessis (South Africa v West Indies in Johannesburg in 2014-15) and KL Rahul (India v West Indies in Lauderhill in Florida in 2016). Read more about Miller's breakneck knock, here.

Jasprit Bumrah took his 50th ODI wicket at the weekend. Is he the fastest to reach this milestone for India? asked Richard Daniels from South Africa
When he dismissed the New Zealand opener Martin Guptill in Kanpur, Jasprit Bumrah brought up 50 wickets in just his 28th one-day international. In all, 17 bowlers have got there quicker than this, only one of them Indian: Ajit Agarkar reached 50 in his 23rd ODI, in September 1998. Mitchell McClenaghan, the New Zealand left-arm seamer, also needed just 23 matches. Only one man has got there quicker: the Sri Lankan spinner Ajantha Mendis reached 50 wickets in his 19th one-day international, in 2008-09.

Which trio of sisters represented New Zealand in a Test? asked Cherise Asha Clarke from New Zealand
Unless I've missed something I don't think there is any case of three sisters representing New Zealand in the same Test match. In fact the only instance I can spot of two sisters turning out for them was the Signal twins - Liz and Rose- against England at Headingley in 1984. That was Rose's only Test, but Liz played five more.

However, there was a near miss for Australia, in the first official women's Test series, against England in 1934-35. Essie Shevill played alongside her married sister Fernie Blade in the opening Test, in Brisbane. Fernie was left out after that, but in the next two matches - in Sydney and in Melbourne - Essie was joined by another sister, Rene. Fernie and Rene were twins; Essie Shevill herself had a twin, Lily, who played for New South Wales but never represented Australia.

Beverly and Louise Browne played together in several Tests for West Indies in the 1970s, while their sister, Anne, kept wicket in 11 one-day internationals between 1993 and 1997 (when she was 42). She later coached the West Indian team.