Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 813 · 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.🧩 Ishaan is 9 years old. Vihaan is 4 years older than Ishaan. How old is Vihaan? (a) 14 (b) not enough info (c) 4 (d) 13
2. 2.🥭 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) no, check more (c) yes, it is certain (d) no mango is sweet
3. 3.🧩 Nisha bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹275 (c) ₹60 (d) ₹55
4. 4.🧩 Ishaan is 9 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 11 (b) 14 (c) not enough info (d) 10
5. 5.🧩 Vihaan bought 2 mangoes and a lunch box for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹98 (c) not enough info (d) ₹50
6. 6.🧩 A box has 3 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 16 (b) 7 (c) 12 (d) not enough info
7. 7.🧩 Arjun bought 5 pens and a cap for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹28 (b) not enough info (c) ₹140 (d) ₹135
8. 8.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
9. 9.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Nisha is 11 years old. Diya is older than Nisha. How old is Diya? (a) 13 (b) 12 (c) 16 (d) not enough info
12. 12.🧩 Saanvi bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹250
13. 13.🧩 Diya bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹40 (c) ₹25 (d) not enough info
14. 14.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Arjun bought 4 notebooks and a cap for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹52 (b) ₹210 (c) ₹206 (d) not enough info
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
18. 18.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Tara is 10 years old. Saanvi is 7 years older than Tara. How old is Saanvi? (a) 7 (b) 17 (c) not enough info (d) 18
21. 21.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
22. 22.🧩 Rohan is 12 years old. Tara is older than Rohan. How old is Tara? (a) 14 (b) 17 (c) not enough info (d) 13
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Nisha is 12 years old. Aarav is older than Nisha. How old is Aarav? (a) 13 (b) 17 (c) not enough info (d) 14
25. 25.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 9 PM (c) not enough info (d) 10 PM
26. 26.🧩 Diya is 6 years old. Tara is 6 years older than Diya. How old is Tara? (a) not enough info (b) 12 (c) 13 (d) 6
27. 27.🧩 Vihaan bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹40 (c) ₹80 (d) ₹45
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Diya bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹15 (d) ₹10
30. 30.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) 7 PM (d) not enough info
31. 31.🧩 Vihaan is 9 years old. Kabir is 7 years older than Vihaan. How old is Kabir? (a) not enough info (b) 17 (c) 16 (d) 7
32. 32.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
33. 33.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
34. 34.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 16 (b) 64 (c) not enough info (d) 72
35. 35.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
37. 37.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
38. 38.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
39. 39.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
40. 40.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it

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