Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 807 · 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.🧩 Kabir bought 2 markers and a cap for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹148 (b) ₹150 (c) not enough info (d) ₹75
2. 2.🧩 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
3. 3.🧩 Ishaan is 10 years old. Tara is 3 years older than Ishaan. How old is Tara? (a) 3 (b) not enough info (c) 13 (d) 14
4. 4.📊 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
5. 5.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
7. 7.🧩 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
8. 8.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Arjun bought 4 mangoes and a lunch box for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹25 (c) not enough info (d) ₹96
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.🧩 Ishaan is 7 years old. Kabir is 4 years older than Ishaan. How old is Kabir? (a) 12 (b) 4 (c) not enough info (d) 11
12. 12.🧩 Kabir bought 4 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹50 (c) ₹180 (d) not enough info
13. 13.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
14. 14.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
15. 15.🧩 Diya bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹35 (c) not enough info (d) ₹30
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
17. 17.🧩 A box has 3 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 11 (b) not enough info (c) 24 (d) 32
18. 18.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
19. 19.🥭 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 mango is sweet (c) yes, it is certain (d) no, check more
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
23. 23.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
26. 26.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
27. 27.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 13 (b) 48 (c) not enough info (d) 40
28. 28.🧩 Tara is 6 years old. Nisha is 7 years older than Tara. How old is Nisha? (a) not enough info (b) 13 (c) 14 (d) 7
29. 29.🧩 Diya bought 6 markers and a water bottle for ₹200 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹194 (c) ₹33 (d) ₹200
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Rohan is 8 years old. Arjun is 7 years older than Rohan. How old is Arjun? (a) not enough info (b) 15 (c) 7 (d) 16
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
33. 33.🧩 Saanvi bought 2 balls and a bag for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) ₹88 (c) ₹45 (d) not enough info
34. 34.🧩 Aarav is 12 years old. Arjun is 8 years older than Aarav. How old is Arjun? (a) 21 (b) 8 (c) not enough info (d) 20
35. 35.🧩 Arjun bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹60
36. 36.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
38. 38.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
39. 39.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Ishaan bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹135

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