Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 599 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
4. 4.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
5. 5.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
8. 8.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
11. 11.🧩 Kabir bought 4 markers and a bag for ₹250 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹62 (c) ₹246 (d) ₹250
12. 12.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
13. 13.🧩 Nisha bought 4 markers for ₹220 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹220
14. 14.🧩 Saanvi bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹60 (c) ₹35 (d) ₹30
15. 15.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Diya bought 4 kites for ₹160 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹160
17. 17.🧩 A box has 5 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 42 (b) 12 (c) 35 (d) not enough info
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
19. 19.🧩 Nisha is 6 years old. Ananya is older than Nisha. How old is Ananya? (a) 7 (b) 11 (c) not enough info (d) 8
20. 20.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
21. 21.🧩 Vihaan is 8 years old. Rohan is older than Vihaan. How old is Rohan? (a) 10 (b) 9 (c) 13 (d) not enough info
22. 22.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
23. 23.🧩 Kabir bought 4 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹100
24. 24.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 6 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 28 (b) 10 (c) not enough info (d) 24
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
28. 28.🧩 Arjun is 11 years old. Nisha is 5 years older than Arjun. How old is Nisha? (a) 16 (b) 5 (c) not enough info (d) 17
29. 29.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Kabir is 10 years old. Diya is older than Kabir. How old is Diya? (a) 15 (b) 12 (c) 11 (d) not enough info
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
32. 32.🧩 Saanvi bought 2 balls for ₹70 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) not enough info (c) ₹70 (d) ₹40
33. 33.🧩 Arjun is 10 years old. Kabir is older than Arjun. How old is Kabir? (a) 12 (b) 11 (c) not enough info (d) 15
34. 34.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
35. 35.🧩 Meera is 10 years old. Aarav is older than Meera. How old is Aarav? (a) 12 (b) not enough info (c) 11 (d) 15
36. 36.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
37. 37.🧩 Aarav bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹60 (d) ₹30
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Arjun is 6 years old. Aarav is older than Arjun. How old is Aarav? (a) not enough info (b) 8 (c) 11 (d) 7
40. 40.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion

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