keyword

most difficult problem in mathematics

Monthly search volume and cost-per-click data for "most difficult problem in mathematics" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=most+difficult+problem+in+mathematics&country=us" +--------------+------------------+ | volume | 480 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-22 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
hardest math problem	22,200	$7.68	20/20
hard math problem	22,200	$10.16	15/20
hardest math equation	8,100	$3.02	14/20
hardest math problem in the world	6,600	$0	20/20
hardest math question	6,600	$9.62	17/20
hardest maths problems in the world	6,600	$0	14/20
hardest math	4,400	$3.79	17/20
toughest math problem ever	720	$0	14/20
most difficult math problems in the world	110	$0	15/20
hardest equation in math	70	$0	15/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=most+difficult+problem+in+mathematics&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt